Add 4 inch TFT display ST7796

lib/obp60task/OBP60Extensions.cpp

@@ -56,6 +56,12 @@ GxEPD2_BW<GxEPD2_420_SE0420NQ04, GxEPD2_420_SE0420NQ04::HEIGHT> display(GxEPD2_4
 GxEPD2_BW<GxEPD2_420_SE0420NQ04, GxEPD2_420_SE0420NQ04::HEIGHT> & getdisplay(){return display;}
 #endif
 
+#ifdef DISPLAY_ST7796
+// only instantiate; class defined in header
+static LGFX display;
+LGFX & getdisplay(){return display;}
+#endif
+
 // Horter I2C moduls
 PCF8574 pcf8574_Modul1(PCF8574_I2C_ADDR1); // First digital IO modul PCF8574 from Horter
 
@@ -251,8 +257,10 @@ void deepSleep(CommonData &common){
     getdisplay().setFont(&Ubuntu_Bold8pt8b);
     getdisplay().setCursor(65, 175);
     getdisplay().print("To wake up press key and wait 5s");
-    getdisplay().nextPage();                // Update display contents
+    displayNextPage();                // Update display contents
+    #ifndef DISPLAY_ST7796
     getdisplay().powerOff();                // Display power off
+    #endif
     setPortPin(OBP_POWER_50, false);        // Power off ePaper display
     // Stop system
     esp_deep_sleep_start();                 // Deep Sleep with weakup via touch pin
@@ -276,8 +284,10 @@ void deepSleep(CommonData &common){
     getdisplay().setFont(&Ubuntu_Bold8pt8b);
     getdisplay().setCursor(65, 175);
     getdisplay().print("To wake up press wheel and wait 5s");
-    getdisplay().nextPage();                // Partial update
+    displayNextPage();                // Partial update
+    #ifndef DISPLAY_ST7796
     getdisplay().powerOff();                // Display power off
+    #endif
     setPortPin(OBP_POWER_EPD, false);       // Power off ePaper display
     setPortPin(OBP_POWER_SD, false);        // Power off SD card
     // Stop system
@@ -479,7 +489,13 @@ std::vector<String> wordwrap(String &line, uint16_t maxwidth) {
 void drawTextCenter(int16_t cx, int16_t cy, String text) {
     int16_t x1, y1;
     uint16_t w, h;
+#ifdef DISPLAY_ST7796
+    // LovyanGFX doesn't expose getTextBounds; use width/height helpers
+    w = getdisplay().textWidth(text);
+    h = getdisplay().fontHeight();
+#else
     getdisplay().getTextBounds(text, 0, 150, &x1, &y1, &w, &h);
+#endif
     getdisplay().setCursor(cx - w / 2, cy + h / 2);
     getdisplay().print(text);
 }
@@ -490,7 +506,12 @@ void drawButtonCenter(int16_t cx, int16_t cy, int8_t sx, int8_t sy, String text,
     uint16_t w, h;
     uint16_t color;
 
+#ifdef DISPLAY_ST7796
+    w = getdisplay().textWidth(text);
+    h = getdisplay().fontHeight();
+#else
     getdisplay().getTextBounds(text, cx, cy, &x1, &y1, &w, &h); // Find text center
+#endif
     getdisplay().setCursor(cx - w/2, cy + h/2);                 // Set cursor to center
     //getdisplay().drawPixel(cx, cy, fg);                         // Debug pixel for center position
     if (inverted) {
@@ -509,7 +530,12 @@ void drawButtonCenter(int16_t cx, int16_t cy, int8_t sx, int8_t sy, String text,
 void drawTextRalign(int16_t x, int16_t y, String text) {
     int16_t x1, y1;
     uint16_t w, h;
+#ifdef DISPLAY_ST7796
+    w = getdisplay().textWidth(text);
+    h = getdisplay().fontHeight();
+#else
     getdisplay().getTextBounds(text, 0, 150, &x1, &y1, &w, &h);
+#endif
     getdisplay().setCursor(x - w - 1, y); // '-1' required since some strings wrap around w/o it
     getdisplay().print(text);
 }
@@ -1000,7 +1026,14 @@ void displayRudderPosition(int rudderPosition, uint8_t rangeDeg, uint16_t cx, ui
         String lbl = String(angle);
         int16_t bx, by;
         uint16_t bw, bh;
-        getdisplay().getTextBounds(lbl, 0, 0, &bx, &by, &bw, &bh);
+        #ifdef DISPLAY_ST7796
+            // LovyanGFX: compute width/height manually
+            bw = getdisplay().textWidth(lbl);
+            bh = getdisplay().fontHeight();
+            bx = 0; by = 0;
+        #else
+            getdisplay().getTextBounds(lbl, 0, 0, &bx, &by, &bw, &bh);
+        #endif
         int16_t tx = xpos - bw/2;
         int16_t ty = top + h + bh + 5; // A little spacing
         getdisplay().setCursor(tx, ty);
@@ -1019,9 +1052,16 @@ void doImageRequest(GwApi *api, int *pageno, const PageStruct pages[MAX_PAGE_NUM
 
     logger->logDebug(GwLog::LOG,"handle image request [%s]: %s", imgformat, filename);
 
-    uint8_t *fb = getdisplay().getBuffer(); // EPD framebuffer
+    uint8_t *fb = nullptr; // EPD framebuffer
     std::vector<uint8_t> imageBuffer;       // image in webserver transferbuffer
     String mimetype;
+    #ifndef DISPLAY_ST7796
+        fb = getdisplay().getBuffer(); // available only for EPD
+    #endif
+    if (!fb) {
+        request->send(500, "text/plain", "screenshot not available");
+        return;
+    }
 
     if (imgformat == "gif") {
         // GIF is commpressed with LZW, so small

lib/obp60task/OBP60Extensions.h

@@ -9,6 +9,10 @@
 #include <Adafruit_FRAM_I2C.h>          // I2C FRAM
 #include <math.h>
 
+#ifdef DISPLAY_ST7796
+#include <LovyanGFX.hpp>                // TFT LCD lib for ST7796
+#endif
+
 #ifdef BOARD_OBP40S3
 #include "esp_vfs_fat.h"
 #include "sdmmc_cmd.h"
@@ -74,11 +78,124 @@ GxEPD2_BW<GxEPD2_420_GYE042A87, GxEPD2_420_GYE042A87::HEIGHT> & getdisplay();
 GxEPD2_BW<GxEPD2_420_SE0420NQ04, GxEPD2_420_SE0420NQ04::HEIGHT> & getdisplay();
 #endif
 
+#ifdef DISPLAY_ST7796
+// LovyanGFX based display wrapper for ST7796
+class LGFX : public lgfx::LGFX_Device {
+public:
+  lgfx::Bus_SPI _bus_instance;
+  lgfx::Light_PWM _light_instance;
+
+  LGFX(void) {
+    {
+      auto cfg = _bus_instance.config();
+      cfg.spi_host = SPI2_HOST;
+      cfg.spi_mode = 0;
+      cfg.freq_write = 80000000;
+      cfg.freq_read  = 16000000;
+      cfg.pin_sclk = OBP_SPI_CLK;
+      cfg.pin_mosi = OBP_SPI_DIN;
+      cfg.pin_miso = -1;
+      cfg.pin_dc   = OBP_SPI_DC;
+      _bus_instance.config(cfg);
+      _panel_instance.setBus(&_bus_instance);
+    }
+    {
+      auto cfg = _panel_instance.config();
+      cfg.pin_cs  = OBP_SPI_CS;
+      cfg.pin_rst = OBP_SPI_RST;
+      cfg.pin_busy = -1;
+      cfg.panel_width  = 480;
+      cfg.panel_height = 320;
+      cfg.offset_x     = 0;
+      cfg.offset_y     = 0;
+      cfg.offset_rotation = 0;
+      cfg.dummy_read_pixel = 8;
+      cfg.dummy_read_bits  = 1;
+      cfg.memory_width     = 480;
+      cfg.memory_height    = 320;
+      // cfg.pwm_control not available in this LovyanGFX version
+      cfg.invert = false;
+      cfg.rgb_order = false;
+      cfg.dlen_16bit = false;
+      cfg.bus_shared = true;
+      _panel_instance.config(cfg);
+    }
+    {
+      auto cfg = _light_instance.config();
+      cfg.pin_bl = -1;
+      _light_instance.config(cfg);
+      _panel_instance.setLight(&_light_instance);
+    }
+    setPanel(&_panel_instance);
+  }
+
+  // compatibility helpers --------------------------------------------------
+  // Adafruit GFX fonts support: ignore on TFT, use base on E-Ink
+  void setFont(const GFXfont *font) { (void)font; }
+  // E-Ink interface compatibility
+  void setFullWindow() { /* no-op on TFT */ }
+
+private:
+  lgfx::Panel_ST7796 _panel_instance;
+};
+
+LGFX & getdisplay();
+#endif
+
 // Page display return values
 #define PAGE_OK 0          // all ok, do nothing
 #define PAGE_UPDATE 1      // page wants display to update
 #define PAGE_HIBERNATE 2   // page wants displey to hibernate
 
+// Display wrapper functions for E-Ink/TFT compatibility
+inline void displayFirstPage() {
+    #ifdef DISPLAY_ST7796
+    // TFT LCD doesn't need firstPage() 
+    #else
+    getdisplay().firstPage();
+    #endif
+}
+
+inline void displayNextPage() {
+    #ifdef DISPLAY_ST7796
+    // TFT LCD doesn't need nextPage() for refresh
+    #else
+    getdisplay().nextPage();
+    #endif
+}
+
+inline void displaySetPartialWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
+    #ifdef DISPLAY_ST7796
+    // TFT LCD doesn't use partial windows
+    (void)x; (void)y; (void)w; (void)h;
+    #else
+    getdisplay().setPartialWindow(x, y, w, h);
+    #endif
+}
+
+inline void displaySetFullWindow() {
+    #ifdef DISPLAY_ST7796
+    // TFT LCD doesn't need setFullWindow()
+    #else
+    getdisplay().setFullWindow();
+    #endif
+}
+
+// replacement for getTextBounds that works with both EPD and ST7796
+inline void displayGetTextBounds(const String &txt, int16_t x, int16_t y,
+                                 int16_t *x0, int16_t *y0,
+                                 uint16_t *w, uint16_t *h) {
+#ifdef DISPLAY_ST7796
+    // LovyanGFX doesn't expose getTextBounds; compute via helpers
+    *w = getdisplay().textWidth(txt);
+    *h = getdisplay().fontHeight();
+    if (x0) *x0 = 0;
+    if (y0) *y0 = 0;
+#else
+    getdisplay().getTextBounds(txt, x, y, x0, y0, w, h);
+#endif
+}
+
 void fillPoly4(const std::vector<Point>& p4, uint16_t color);
 void drawPoly(const std::vector<Point>& points, uint16_t color);
 

lib/obp60task/OBP60QRWiFi.h

@@ -39,7 +39,7 @@ void qrWiFi(String ssid, String passwd, uint16_t fgcolor, uint16_t bgcolor){
   getdisplay().setTextColor(fgcolor);
   getdisplay().setCursor(140, 285);
   getdisplay().print("WiFi");
-  getdisplay().nextPage();                 // Full Refresh
+  displayNextPage();                 // Full Refresh
 }
 
 #endif

lib/obp60task/OBPcharts.cpp

@@ -28,8 +28,14 @@ Chart::Chart(RingBuffer<uint16_t>& dataBuf, double dfltRng, CommonData& common,
     fgColor = commonData->fgcolor;
     bgColor = commonData->bgcolor;
 
-    dWidth = getdisplay().width();
+    // display dimensions (avoid calling width()/height() on incomplete LGFX type)
-    dHeight = getdisplay().height();
+    #ifdef DISPLAY_ST7796
+        dWidth = 480;
+        dHeight = 320;
+    #else
+        dWidth = getdisplay().width();
+        dHeight = getdisplay().height();
+    #endif
 
     dataBuf.getMetaData(dbName, dbFormat);
     dbMIN_VAL = dataBuf.getMinVal();

lib/obp60task/PageAutopilot.cpp

@@ -117,7 +117,7 @@ class PageAutopilot : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
         getdisplay().setTextColor(commonData->fgcolor);
 /*
         // Horizontal line 2 pix top & bottom

lib/obp60task/PageBME280.cpp

@@ -105,7 +105,7 @@ class PageBME280 : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageBattery.cpp

@@ -158,7 +158,7 @@ class PageBattery : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         // Show average settings
         getdisplay().setTextColor(commonData->fgcolor);

lib/obp60task/PageBattery2.cpp

@@ -184,7 +184,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageClock.cpp

@@ -375,7 +375,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 
@@ -442,8 +442,8 @@ public:
             uint16_t wDigit, hDigit;
             uint16_t wColon, hColon;
 
-            getdisplay().getTextBounds("00", 0, 0, &x0, &y0, &wDigit, &hDigit);
+displayGetTextBounds("00", 0, 0, &x0, &y0, &wDigit, &hDigit);
-            getdisplay().getTextBounds(":", 0, 0, &x0, &y0, &wColon, &hColon);
+displayGetTextBounds(":", 0, 0, &x0, &y0, &wColon, &hColon);
 
             uint16_t totalWidth = 3 * wDigit + 2 * wColon;
 
@@ -453,7 +453,7 @@ public:
             // Draw time string centered
             int16_t x1b, y1b;
             uint16_t wb, hb;
-            getdisplay().getTextBounds(timeStr, 0, 0, &x1b, &y1b, &wb, &hb);
+            displayGetTextBounds(timeStr, 0, 0, &x1b, &y1b, &wb, &hb);
             int16_t textX = (static_cast<int16_t>(getdisplay().width()) - static_cast<int16_t>(wb)) / 2;
             int16_t textY = centerY + hb / 2;
 
@@ -520,7 +520,7 @@ public:
 
             int16_t x1b, y1b;
             uint16_t wb, hb;
-            getdisplay().getTextBounds(timeStr, 0, 0, &x1b, &y1b, &wb, &hb);
+            displayGetTextBounds(timeStr, 0, 0, &x1b, &y1b, &wb, &hb);
 
             int16_t x = (static_cast<int16_t>(getdisplay().width()) - static_cast<int16_t>(wb)) / 2;
             int16_t y = 150 + hb / 2;
@@ -665,7 +665,7 @@ public:
                 // Print text centered on position x, y
                 int16_t x1c, y1c;     // Return values of getTextBounds
                 uint16_t wc, hc;      // Return values of getTextBounds
-                getdisplay().getTextBounds(ii, int(x), int(y), &x1c, &y1c, &wc, &hc); // Calc width of new string
+                displayGetTextBounds(ii, int(x), int(y), &x1c, &y1c, &wc, &hc); // Calc width of new string
                 getdisplay().setCursor(x - wc / 2, y + hc / 2);
                 if (i % 90 == 0) {
                     getdisplay().setFont(&Ubuntu_Bold12pt8b);

lib/obp60task/PageCompass.cpp

@@ -109,7 +109,7 @@ class PageCompass : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
         getdisplay().setTextColor(commonData->fgcolor);
 
         // Horizontal line 2 pix top & bottom

lib/obp60task/PageDST810.cpp

@@ -91,7 +91,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageDigitalOut.cpp

@@ -106,7 +106,7 @@ bool button5 = false;
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
         getdisplay().setTextColor(commonData->fgcolor);
         getdisplay().setFont(&Ubuntu_Bold12pt8b);
         // Write text

lib/obp60task/PageFluid.cpp

@@ -138,7 +138,7 @@ class PageFluid : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height());
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height());
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageFourValues.cpp

@@ -91,7 +91,7 @@ class PageFourValues : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageFourValues2.cpp

@@ -91,7 +91,7 @@ class PageFourValues2 : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageGenerator.cpp

@@ -83,7 +83,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageKeelPosition.cpp

@@ -68,7 +68,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
 //*******************************************************************************************
         
@@ -105,7 +105,7 @@ public:
             // Print text centered on position x, y
             int16_t x1, y1;     // Return values of getTextBounds
             uint16_t w, h;      // Return values of getTextBounds
-            getdisplay().getTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
+            displayGetTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
             getdisplay().setCursor(x-w/2, y+h/2);
             if(i % 30 == 0){
                 getdisplay().setFont(&Ubuntu_Bold8pt8b);

lib/obp60task/PageNavigation.cpp

@@ -371,7 +371,7 @@ bool showValues = false; // Show values HDT, SOG, DBT in navigation map
         // ############### Draw Navigation Map ################
         
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
         getdisplay().setTextColor(commonData->fgcolor);
 
         // If a network connection to URL then load the navigation map

lib/obp60task/PageOneValue.cpp

@@ -276,7 +276,7 @@ public:
         // Draw page
         //***********************************************************
 
-        getdisplay().setPartialWindow(0, 0, width, height); // Set partial update
+        displaySetPartialWindow(0, 0, width, height); // Set partial update
 
         if (pageMode == VALUE || dataHstryBuf == nullptr) {
             // show only data value; ignore other pageMode options if no chart supported boat data history buffer is available

lib/obp60task/PageRollPitch.cpp

@@ -116,7 +116,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 
@@ -194,7 +194,7 @@ public:
                 // Print text centered on position x, y
                 int16_t x1, y1;     // Return values of getTextBounds
                 uint16_t w, h;      // Return values of getTextBounds
-                getdisplay().getTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
+                displayGetTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
                 getdisplay().setCursor(x-w/2, y+h/2);
                 if(i % 20 == 0){
                     getdisplay().setFont(&Ubuntu_Bold8pt8b);

lib/obp60task/PageRudderPosition.cpp

@@ -72,7 +72,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
 //*******************************************************************************************
         
@@ -110,7 +110,7 @@ public:
             // Print text centered on position x, y
             int16_t x1, y1;     // Return values of getTextBounds
             uint16_t w, h;      // Return values of getTextBounds
-            getdisplay().getTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
+            displayGetTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
             getdisplay().setCursor(x-w/2, y+h/2);
             if(i % 30 == 0){
                 getdisplay().setFont(&Ubuntu_Bold8pt8b);

lib/obp60task/PageSixValues.cpp

@@ -75,7 +75,7 @@ class PageSixValues : public Page
             //***********************************************************
     
             // Set display in partial refresh mode
-            getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+            displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
             getdisplay().setTextColor(commonData->fgcolor);
 
             for (int i = 0; i < ( HowManyValues / 2 ); i++){

lib/obp60task/PageSkyView.cpp

@@ -73,7 +73,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         // current position
         getdisplay().setFont(&Ubuntu_Bold8pt8b);
@@ -105,19 +105,19 @@ public:
         uint16_t w, h;
         getdisplay().setFont(&Ubuntu_Bold12pt8b);
 
-		getdisplay().getTextBounds("N", 0, 150, &x1, &y1, &w, &h);
+		displayGetTextBounds("N", 0, 150, &x1, &y1, &w, &h);
         getdisplay().setCursor(c.x - w / 2, c.y - r + h + 3);
         getdisplay().print("N");
 
-		getdisplay().getTextBounds("S", 0, 150, &x1, &y1, &w, &h);
+		displayGetTextBounds("S", 0, 150, &x1, &y1, &w, &h);
         getdisplay().setCursor(c.x - w / 2, c.y + r - 3);
         getdisplay().print("S");
 
-		getdisplay().getTextBounds("E", 0, 150, &x1, &y1, &w, &h);
+		displayGetTextBounds("E", 0, 150, &x1, &y1, &w, &h);
         getdisplay().setCursor(c.x + r - w - 3, c.y + h / 2);
         getdisplay().print("E");
         
-		getdisplay().getTextBounds("W", 0, 150, &x1, &y1, &w, &h);
+		displayGetTextBounds("W", 0, 150, &x1, &y1, &w, &h);
         getdisplay().setCursor(c.x - r + 3 , c.y + h / 2);
         getdisplay().print("W");
 

lib/obp60task/PageSolar.cpp

@@ -82,7 +82,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageSystem.cpp

@@ -229,7 +229,7 @@ public:
         uint16_t y0 = 48; // data table starts here
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         if (mode == 'N') {
 
@@ -550,7 +550,7 @@ public:
         }
 
         // Update display
-        getdisplay().nextPage();    // Partial update (fast)
+        displayNextPage();    // Partial update (fast)
         return PAGE_OK;
     };
 };

lib/obp60task/PageThreeValues.cpp

@@ -80,7 +80,7 @@ class PageThreeValues : public Page
         //***********************************************************
 
         /// Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         // ############### Value 1 ################
 

lib/obp60task/PageTwoValues.cpp

@@ -283,7 +283,7 @@ public:
         // Draw page
         //***********************************************************
 
-        getdisplay().setPartialWindow(0, 0, width, height); // Set partial update
+        displaySetPartialWindow(0, 0, width, height); // Set partial update
 
         if (pageMode == VALUES || (dataHstryBuf[0] == nullptr && dataHstryBuf[1] == nullptr)) {
             // show only data value; ignore other pageMode options if no chart supported boat data history buffer is available

lib/obp60task/PageVoltage.cpp

@@ -193,7 +193,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         if (mode == 'D') {
             // Display mode digital

lib/obp60task/PageWhite.cpp

@@ -63,7 +63,7 @@ public:
         if (mode == 'W') {
             getdisplay().setFullWindow();
         } else {
-            getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+            displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
         }
 
         if (mode == 'L') {

lib/obp60task/PageWind.cpp

@@ -358,7 +358,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 

lib/obp60task/PageWindPlot.cpp

@@ -221,7 +221,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, width, height); // Set partial update
+        displaySetPartialWindow(0, 0, width, height); // Set partial update
         getdisplay().setTextColor(commonData->fgcolor);
 
         if (chrtMode == DIRECTION) {

lib/obp60task/PageWindRose.cpp

@@ -140,7 +140,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 
@@ -260,7 +260,7 @@ public:
             // Print text centered on position x, y
             int16_t x1, y1;     // Return values of getTextBounds
             uint16_t w, h;      // Return values of getTextBounds
-            getdisplay().getTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
+            displayGetTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
             getdisplay().setCursor(x-w/2, y+h/2);
             if(i % 30 == 0){
                 getdisplay().setFont(&Ubuntu_Bold8pt8b);

lib/obp60task/PageWindRoseFlex.cpp

@@ -200,7 +200,7 @@ public:
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 
@@ -314,7 +314,7 @@ public:
             // Print text centered on position x, y
             int16_t x1, y1;     // Return values of getTextBounds
             uint16_t w, h;      // Return values of getTextBounds
-            getdisplay().getTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
+            displayGetTextBounds(ii, int(x), int(y), &x1, &y1, &w, &h); // Calc width of new string
             getdisplay().setCursor(x-w/2, y+h/2);
             if(i % 30 == 0){
                 getdisplay().setFont(&Ubuntu_Bold8pt8b);

lib/obp60task/PageXTETrack.cpp

@@ -89,7 +89,7 @@ class PageXTETrack : public Page
         //***********************************************************
 
         // Set display in partial refresh mode
-        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 
         getdisplay().setTextColor(commonData->fgcolor);
 
@@ -112,25 +112,25 @@ class PageXTETrack : public Page
 
         GwApi::BoatValue *bv_xte = pageData.values[0]; // XTE
         String sval_xte = formatValue(bv_xte, *commonData).svalue;
-        getdisplay().getTextBounds(sval_xte, 0, 0, &x, &y, &w, &h);
+        displayGetTextBounds(sval_xte, 0, 0, &x, &y, &w, &h);
         getdisplay().setCursor(160-w, 170);
         getdisplay().print(sval_xte);
 
         GwApi::BoatValue *bv_cog = pageData.values[1]; // COG
         String sval_cog = formatValue(bv_cog, *commonData).svalue;
-        getdisplay().getTextBounds(sval_cog, 0, 0, &x, &y, &w, &h);
+        displayGetTextBounds(sval_cog, 0, 0, &x, &y, &w, &h);
         getdisplay().setCursor(360-w, 170);
         getdisplay().print(sval_cog);
 
         GwApi::BoatValue *bv_dtw = pageData.values[2]; // DTW
         String sval_dtw = formatValue(bv_dtw, *commonData).svalue;
-        getdisplay().getTextBounds(sval_dtw, 0, 0, &x, &y, &w, &h);
+        displayGetTextBounds(sval_dtw, 0, 0, &x, &y, &w, &h);
         getdisplay().setCursor(160-w, 257);
         getdisplay().print(sval_dtw);
 
         GwApi::BoatValue *bv_btw = pageData.values[3]; // BTW
         String sval_btw = formatValue(bv_btw, *commonData).svalue;
-        getdisplay().getTextBounds(sval_btw, 0, 0, &x, &y, &w, &h);
+        displayGetTextBounds(sval_btw, 0, 0, &x, &y, &w, &h);
         getdisplay().setCursor(360-w, 257);
         getdisplay().print(sval_btw);
 
@@ -149,7 +149,7 @@ class PageXTETrack : public Page
         }
 
         getdisplay().setFont(&Ubuntu_Bold10pt8b);
-        getdisplay().getTextBounds(sval_wpname, 0, 150, &x, &y, &w, &h);
+        displayGetTextBounds(sval_wpname, 0, 150, &x, &y, &w, &h);
         // TODO if text don't fix use smaller font size.
         // if smallest size does not fit use 2 lines
         // last resort: clip with ellipsis

lib/obp60task/obp60task.cpp

@@ -284,8 +284,10 @@ void underVoltageError(CommonData &common) {
     getdisplay().setFont(&Ubuntu_Bold8pt8b);
     getdisplay().setCursor(65, 175);
     getdisplay().print("Charge battery and restart system");
-    getdisplay().nextPage();                // Partial update
+    displayNextPage();                // Partial update
+    #ifndef DISPLAY_ST7796
     getdisplay().powerOff();                // Display power off
+    #endif
     setPortPin(OBP_POWER_EPD, false);       // Power off ePaper display
     setPortPin(OBP_POWER_SD, false);        // Power off SD card
 #else
@@ -295,7 +297,7 @@ void underVoltageError(CommonData &common) {
     buzzer(TONE4, 20);                      // Buzzer tone 4kHz 20ms
     setPortPin(OBP_POWER_50, false);        // Power rail 5.0V Off
     // Shutdown EInk display
-    getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+    displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
     getdisplay().fillScreen(common.bgcolor);// Clear screen
     getdisplay().setTextColor(common.fgcolor);
     getdisplay().setFont(&Ubuntu_Bold20pt8b);
@@ -304,8 +306,10 @@ void underVoltageError(CommonData &common) {
     getdisplay().setFont(&Ubuntu_Bold8pt8b);
     getdisplay().setCursor(65, 175);
     getdisplay().print("To wake up repower system");
-    getdisplay().nextPage();                // Partial update
+    displayNextPage();                // Partial update
+    #ifndef DISPLAY_ST7796
     getdisplay().powerOff();                // Display power off
+    #endif
 #endif
     while (true) {
         esp_deep_sleep_start(); // Deep Sleep without wakeup. Wakeup only after power cycle (restart).
@@ -375,36 +379,38 @@ void OBP60Task(GwApi *api){
 
     #ifdef DISPLAY_GDEY042T81
         getdisplay().init(115200, true, 2, false);  // Init for Waveshare boards with "clever" reset circuit, 2ms reset pulse
+    #elif defined DISPLAY_ST7796
+        getdisplay().init();                        // Init for ST7796 TFT LCD
     #else
         getdisplay().init(115200);                  // Init for normal displays
     #endif
 
     getdisplay().setRotation(0);                 // Set display orientation (horizontal)
-    getdisplay().setFullWindow();                // Set full Refresh
+    displaySetFullWindow();                       // Set full Refresh (E-Ink only)
-    getdisplay().firstPage();                    // set first page
+    displayFirstPage();                           // set first page
     getdisplay().fillScreen(commonData.bgcolor);
     getdisplay().setTextColor(commonData.fgcolor);
-    getdisplay().nextPage();                     // Full Refresh
+    displayNextPage();                            // Full Refresh
-    getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+    displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update (E-Ink only)
     getdisplay().fillScreen(commonData.bgcolor);
-    getdisplay().nextPage();                     // Fast Refresh
+    displayNextPage();                            // Fast Refresh
-    getdisplay().nextPage();                     // Fast Refresh
+    displayNextPage();                            // Fast Refresh
     if(String(displaymode) == "Logo + QR Code" || String(displaymode) == "Logo"){
         getdisplay().fillScreen(commonData.bgcolor);
         getdisplay().drawBitmap(0, 0, gImage_Logo_OBP_400x300_sw, getdisplay().width(), getdisplay().height(), commonData.fgcolor); // Draw start logo
-        getdisplay().nextPage();                 // Fast Refresh
+        displayNextPage();                 // Fast Refresh
-        getdisplay().nextPage();                 // Fast Refresh
+        displayNextPage();                 // Fast Refresh
         delay(SHOW_TIME);                        // Logo show time
         if(String(displaymode) == "Logo + QR Code"){
             getdisplay().fillScreen(commonData.bgcolor);
             qrWiFi(systemname, wifipass, commonData.fgcolor, commonData.bgcolor);  // Show QR code for WiFi connection
-            getdisplay().nextPage();             // Fast Refresh
+            displayNextPage();             // Fast Refresh
-            getdisplay().nextPage();             // Fast Refresh
+            displayNextPage();             // Fast Refresh
             delay(SHOW_TIME);                    // QR code show time
         }
         getdisplay().fillScreen(commonData.bgcolor);
-        getdisplay().nextPage();                 // Fast Refresh
+        displayNextPage();                 // Fast Refresh
-        getdisplay().nextPage();                 // Fast Refresh
+        displayNextPage();                 // Fast Refresh
     }
     
     // Init pages
@@ -722,9 +728,12 @@ void OBP60Task(GwApi *api){
             if(millis() > starttime4 + 8000 && delayedDisplayUpdate == true){
                 starttime1 = millis();
                 starttime2 = millis();
-                getdisplay().setFullWindow();    // Set full update
+                displaySetFullWindow();            // Set full update
+                #ifdef DISPLAY_ST7796
+                // TFT LCD doesn't need refresh operations
+                #else
                 if(fastrefresh == "true"){
-                    getdisplay().nextPage();                     // Full update
+                    displayNextPage();                     // Full update
                 }
                 else{
                     getdisplay().fillScreen(commonData.fgcolor); // Clear display
@@ -734,13 +743,14 @@ void OBP60Task(GwApi *api){
                     #else
                         getdisplay().init(115200);               // Init for normal displays
                     #endif
-                    getdisplay().firstPage();                    // Full update
+                    displayFirstPage();                    // Full update
-                    getdisplay().nextPage();                     // Full update
+                    displayNextPage();                     // Full update
 //                    getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 //                    getdisplay().fillScreen(commonData.bgcolor); // Clear display
 //                    getdisplay().nextPage();                     // Partial update
 //                    getdisplay().nextPage();                     // Partial update
                 }
+                #endif
                 delayedDisplayUpdate = false;
             }
 
@@ -750,9 +760,12 @@ void OBP60Task(GwApi *api){
                 starttime1 = millis();
                 starttime2 = millis();
                 LOG_DEBUG(GwLog::DEBUG,"E-Ink full refresh first 5 min");
-                getdisplay().setFullWindow();    // Set full update
+                displaySetFullWindow();            // Set full update
+                #ifdef DISPLAY_ST7796
+                // TFT LCD doesn't need refresh operations
+                #else
                 if(fastrefresh == "true"){
-                    getdisplay().nextPage();                     // Full update
+                    displayNextPage();                     // Full update
                 }
                 else{
                     getdisplay().fillScreen(commonData.fgcolor); // Clear display
@@ -762,19 +775,23 @@ void OBP60Task(GwApi *api){
                     #else
                         getdisplay().init(115200);               // Init for normal displays
                     #endif
-                    getdisplay().firstPage();                    // Full update
+                    displayFirstPage();                    // Full update
-                    getdisplay().nextPage();                     // Full update
+                    displayNextPage();                     // Full update
 //                    getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
 //                    getdisplay().fillScreen(commonData.bgcolor); // Clear display
 //                    getdisplay().nextPage();                     // Partial update
 //                    getdisplay().nextPage();                     // Partial update
                 }
+                #endif
             }
 
             // Subtask E-Ink full refresh
             if(millis() > starttime2 + fullrefreshtime * 60 * 1000){
                 starttime2 = millis();
                 LOG_DEBUG(GwLog::DEBUG,"E-Ink full refresh");
+                #ifdef DISPLAY_ST7796
+                // TFT LCD: no special refresh
+                #else
                 getdisplay().setFullWindow();    // Set full update
                 if(fastrefresh == "true"){
                     getdisplay().nextPage();                     // Full update
@@ -794,6 +811,7 @@ void OBP60Task(GwApi *api){
 //                    getdisplay().nextPage();                     // Partial update
 //                    getdisplay().nextPage();                     // Partial update
                 }
+                #endif
             }        
                 
             // Refresh display data, default all 1s
@@ -842,13 +860,13 @@ void OBP60Task(GwApi *api){
                     if (currentPage == NULL){
                         LOG_DEBUG(GwLog::ERROR,"page number %d not found", pageNumber);
                         // Error handling for missing page
-                        getdisplay().setPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
+                        displaySetPartialWindow(0, 0, getdisplay().width(), getdisplay().height()); // Set partial update
                         getdisplay().fillScreen(commonData.bgcolor);  // Clear display
                         getdisplay().drawXBitmap(200 - unknown_width / 2, 150 - unknown_height / 2, unknown_bits, unknown_width, unknown_height, commonData.fgcolor);
                         getdisplay().setCursor(140, 250);
                         getdisplay().setFont(&Atari16px);
                         getdisplay().print("Here be dragons!");
-                        getdisplay().nextPage(); // Partial update (fast)
+                        displayNextPage(); // Partial update (fast)
                     }
                     else{
                         if (lastPage != pageNumber){
@@ -871,10 +889,12 @@ void OBP60Task(GwApi *api){
                             displayAlarm(commonData);
                         }
                         if (ret & PAGE_UPDATE) {
-                            getdisplay().nextPage(); // Partial update (fast)
+                            displayNextPage(); // Partial update (fast)
                         }
                         if (ret & PAGE_HIBERNATE) {
+    #ifndef DISPLAY_ST7796
                             getdisplay().hibernate();
+    #endif
                         }
                     }
 

lib/obp60task/platformio.ini

@@ -45,6 +45,7 @@ lib_deps =
     milesburton/DallasTemperature@3.11.0
     signetica/SunRise@2.0.2
     adafruit/Adafruit FRAM I2C@2.0.3
+    lovyan03/LovyanGFX@^1.2.19
 build_flags=
     #https://thingpulse.com/usb-settings-for-logging-with-the-esp32-s3-in-platformio/?srsltid=AfmBOopGskbkr4GoeVkNlFaZXe_zXkLceKF6Rn-tmoXABCeAR2vWsdHL
 #    -D CORE_DEBUG_LEVEL=1           #Debug level for CPU core via CDC (serial device)
@@ -54,9 +55,10 @@ build_flags=
 #    -D HARDWARE_V20                 #OBP60 hardware revision V2.0
     -D HARDWARE_V21                 #OBP60 hardware revision V2.1
 #    -D DISPLAY_GDEW042T2            #old E-Ink display from GoodDisplay (Waveshare), R10 0.47 ohm - very good
-    -D DISPLAY_GDEY042T81           #new E-Ink display from GoodDisplay (Waveshare), R10 2.2 ohm - good (contast lost by shunshine)
+#    -D DISPLAY_GDEY042T81           #new E-Ink display from GoodDisplay (Waveshare), R10 2.2 ohm - good (contast lost by shunshine)
 #    -D DISPLAY_GYE042A87            #alternativ E-Ink display from Genyo Optical, R10 2.2 ohm - medium 
 #    -D DISPLAY_SE0420NQ04           #alternativ E-Ink display from SID Technology, R10 2.2 ohm - bad (burn in effects)
+    -D DISPLAY_ST7796               #ST7796 TFT LCD display (480x320 color display)
 #    -D DISPLAY_ZJY400300-042CAAMFGN #alternativ E-Ink display from ZZE Technology, R10 2.2 ohm - very good
 #    -D ENABLE_PATCHES               #enable patching of gateway code
     ${env.build_flags}
@@ -101,11 +103,13 @@ lib_deps =
     milesburton/DallasTemperature@3.11.0
     signetica/SunRise@2.0.2
     adafruit/Adafruit FRAM I2C@2.0.3
+    lovyan03/LovyanGFX@^1.2.19
 build_flags=
     -D DISABLE_DIAGNOSTIC_OUTPUT    #Disable diagnostic output for GxEPD2 lib
     -D BOARD_OBP40S3                #Board OBP40 with ESP32S3
     -D HARDWARE_V10                 #OBP40 hardware revision V1.0 SKU:DIE07300S V1.1 (CrowPanel 4.2)
-    -D DISPLAY_GDEY042T81           #new E-Ink display from Good Display (Waveshare), R10 2.2 ohm - good (contast lost by shunshine)
+#    -D DISPLAY_GDEY042T81           #new E-Ink display from Good Display (Waveshare), R10 2.2 ohm - good (contast lost by shunshine)
+    -D DISPLAY_ST7796               #ST7796 TFT LCD display (480x320 color display)
     #-D DISPLAY_ZJY400300-042CAAMFGN #alternativ E-Ink display from ZZE Technology, R10 2.2 ohm - very good   
     -D LIPO_ACCU_1200               #Hardware extension, LiPo accu 3,7V 1200mAh
     -D VOLTAGE_SENSOR               #Hardware extension, LiPo voltage sensor with two resistors